rock music is old,but it was different types of rock in the olden days that blew records!
Old rock is a lot better since at least back then music actually made sense, which in today's rock lyrics it is just plain nonsense.
Rock music was developed in the 60's and most people who listen to Rock Music where teenagers or young adults during that time.
They played rock and heavy metal
they are considered pop, not rock, their old music was rock though
No one can really know, but I thing modern rock music, meaning not "rockabilly" type music, has been around since the "British Invasion" of 1964.
"Rock and roll"
It is a rock music song.
Old rock n roll.
The rock band Mother Love Bone will record new music again as they are currently working on a new album.
Age.
Heavy rock / metal, progressive, punk.
If you're going by how it sounds it 100% subjective. But if you want to go purely sales figures definitely old music